package com.xiaolun;

/**
 * @Author 硕鼠
 * @Date 2020/6/1 15:17
 * @Version 1.0
 * @Description 文件说明
 */
//死锁：多个线程互相抱着对方需要的资源，然后形成僵持。
public class DeadLock {
    public static void main(String[] args) {
        Makeup g1 = new Makeup(0, "灰姑娘");
        Makeup g2 = new Makeup(1, "白雪公主");

        g1.start();
        g2.start();
    }
}

//口红
class Lipstick{
}

//镜子
class Mirror{
}

class Makeup extends Thread{

    //需要的资源只有一份，使用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    int choice; //选择
    String girlName; //使用化妆品的人

    Makeup(int choice,String girlName){
        this.choice = choice;
        this.girlName = girlName;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //互相持有对方的锁，就是需要拿到对方的资源
    public void makeup() throws Exception {
        if (choice == 0){
            synchronized (lipstick){
                System.out.println(this.girlName+"获得口红的锁");
            }
            Thread.sleep(1000);
            synchronized (mirror){
                System.out.println(this.girlName+"获得镜子的锁");
            }
        }else {
            synchronized (mirror){
                System.out.println(this.girlName+"获得镜子的锁");
            }
            Thread.sleep(2000);
            synchronized (lipstick){
                System.out.println(this.girlName+"获得镜子的锁");
            }
        }
    }
}